The Crystal Palace F.C. Under-21s is the Under-21 Development team of Crystal Palace Football Club. They play in Premier League 2, the top level of reserve football in England and also compete in the Premier League Cup, Premier League International Cup and EFL Trophy.

The Crystal Palace F.C. Academy consists of the Under-18s and other youth teams of Crystal Palace Football Club. The Under-18 team compete in the U18 Premier League and FA Youth Cup. The academy has produced a number of well known international players over the years such as Johnny Byrne, Kenny Sansom, Peter Nicholas, Gareth Southgate and Wilfried Zaha.

Crystal Palace U21 er reservelaget til den engelske fotballklubben Crystal Palace, som spiller i Premier League. Laget konkurrerer i Premier League 2, den høyeste divisjonen for reservelag i engelsk fotball.

Crystal Palace U21-laget ble grunnlagt i 1992 og har spilt på Selhurst Park Stadium siden 1994. Laget har vunnet Premier League 2 to ganger, i sesongene 2003–04 og 2012–13.

Noen av de mest kjente spillerne som har spilt for Crystal Palace U21 inkluderer Wilfried Zaha, Aaron Wan-Bissaka og Nathaniel Clyne.